#!/sbin/openrc-run
# OpenRC init script for inter-hub on haskelseed (Alpine 3.23, OpenRC 0.63).
# Deploy to: /etc/init.d/interhub (chmod +x)
# Enable: rc-update add postgresql default && rc-update add interhub default
#
# Also required in /etc/conf.d/postgresql:
#   data_dir="/var/lib/postgresql17/data"
#
# App is exposed publicly on port 8080 (socat forward from IHP's 127.0.0.1:8000).
# Logs: /var/log/interhub/rundevserver.log  and  /var/log/interhub/socat.log

name="inter-hub"
description="IHF v0.2 reference implementation (RunDevServer + socat forward)"

IHUB_DIR="/root/inter-hub"
LOG_DIR="/var/log/interhub"
RUNDEV_LOG="${LOG_DIR}/rundevserver.log"
SOCAT_LOG="${LOG_DIR}/socat.log"
RUNDEV_PID="${LOG_DIR}/rundevserver.pid"
SOCAT_PID="${LOG_DIR}/socat.pid"

GHC_BIN="/nix/store/ssq6yzl7ldy743g15wskzbgryd9zkk7g-ghc-9.10.3-with-packages/bin"

depend() {
    need postgresql
    after nix-daemon
}

start() {
    ebegin "Starting inter-hub"

    mkdir -p "${LOG_DIR}"

    # Ensure GHCi can read .ghci (rsync restores build:build ownership)
    chown -R root:root "${IHUB_DIR}"

    # Start RunDevServer via wrapper (wrapper sets all required env vars)
    start-stop-daemon --start \
        --background \
        --make-pidfile --pidfile "${RUNDEV_PID}" \
        --stdout "${RUNDEV_LOG}" --stderr "${RUNDEV_LOG}" \
        --exec /usr/local/bin/interhub-rundevserver

    # Wait up to 90 s for RunDevServer to bind port 8000
    local waited=0
    while [ $waited -lt 90 ]; do
        netstat -tn 2>/dev/null | grep -q "127.0.0.1:8000" && break
        sleep 3
        waited=$((waited + 3))
    done

    # Expose the app on all interfaces at port 8080
    start-stop-daemon --start \
        --background \
        --make-pidfile --pidfile "${SOCAT_PID}" \
        --stdout "${SOCAT_LOG}" --stderr "${SOCAT_LOG}" \
        --exec /usr/bin/socat -- \
        TCP-LISTEN:8080,bind=0.0.0.0,reuseaddr,fork TCP:127.0.0.1:8000

    eend $?
}

stop() {
    ebegin "Stopping inter-hub"
    start-stop-daemon --stop --pidfile "${SOCAT_PID}" --quiet
    start-stop-daemon --stop --pidfile "${RUNDEV_PID}" --quiet
    eend $?
}